Irish Brook Dam dam
Irish Brook Dam
Irish Brook Dam is a privately owned recreational structure located in Bloomingdale Borough, Passaic, New Jersey. Built in 1923, this concrete dam stands at a height of 16.5 feet and has a storage capacity of 990 acre-feet, serving as a vital resource for the local community. The dam spans 259 feet in length and covers a surface area of 73 acres, with a drainage area of 3.7 square miles along the Irish Brook.
Managed by the New Jersey Department of Environmental Protection (NJDEP), Irish Brook Dam is regulated and inspected regularly to ensure its structural integrity and safety. The dam's hazard potential is classified as high, although its condition is assessed as satisfactory as of the last inspection in October 2021. With a primary purpose of recreation, the dam provides a picturesque setting for outdoor activities and serves as a significant landmark in the region, attracting water resource and climate enthusiasts alike.
Irish Brook Dam's historical significance and contribution to water management in the area make it a noteworthy site for those interested in environmental conservation and sustainable resource utilization. As a key feature of the local landscape, the dam's continued maintenance and adherence to regulatory standards are essential for preserving its functionality and ensuring the safety of surrounding communities. Whether for recreational enjoyment or as a testament to engineering ingenuity, Irish Brook Dam remains a valuable asset in New Jersey's water infrastructure network.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Irish Brook Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wanaque R At Wanaque Nj | 14 cfs | → |
| Pequannock River At Riverdale Nj | 29 cfs | → |
| West Brook Near Wanaque Nj | 7 cfs | → |
| Ramapo River At Pompton Lakes Nj | 122 cfs | → |
| Pequannock R At Macopin Intake Dam Nj | 14 cfs | → |
| Pompton River At Pompton Plains Nj | 145 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Irish Brook Dam.
Boat launches
- Lakeside Avenue Pompton Lakes
- North Corporate Drive 2, Riverdale
- Greenwood Lake Turnpike Ringwood
- Ringwood-Ramapo Trail Ringwood
- Blue Lake Road Town Of Warwick
- Island Avenue Little Falls
Track Irish Brook Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Irish Brook Dam
Where does the data for Irish Brook Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Irish Brook Dam.